idiom
we'll cross that bridge when we come to it
私たちは将来起こるかもしれない問題については心配せず、それが起こった時に対処します
Meaning
we will not worry about a possible future problem but will deal with it if it happens
Example
I don't know how we'll pay for the repairs, but **we'll cross that bridge when we come to it**.
修理の支払いがどうなるかわかりませんが、時が来たら対処します